Ice flow refers to the movement of ice, typically in glaciers or ice sheets, caused by gravity and the pressure of overlying ice. As the ice accumulates, it becomes denser and begins to flow slowly downhill or outward. This movement can create crevasses and other features on the surface of the ice. The rate of ice flow can vary based on factors such as temperature, slope, and the presence of meltwater. Meltwater can act as a lubricant, allowing the ice to slide more easily over the underlying surface. Understanding ice flow is crucial for studying climate change and its impact on sea levels and ecosystems.